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HMF Racing Competition Series Silencer
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    HMF Racing Competition Series Silencer

    Our price: $332.99

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    • "Customer service is priority #1 at Rocky Mountain ATV/MC. We value our customers and strive to be the best shopping experience- when you buy from us, you are buying lifetime service."

      -Dan Thomas, CEO and Founder

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      With three removable inserts that change your ATV’s sound and power levels, HMF Racing’s Competition Series Silencer lets you dial in your machine’s performance perfectly. At the heart of the Competition’s powder coated, 6063 T6 aluminum alloy canister is the unique Trimax Core. This core has a triangular shape designed to extract every bit of horsepower and every pound foot of torque from specific areas of your power band. Using the different inserts, the core can be tuned for aggressive sound lowering, moderate sound lowering, and unmoderated sound. Each with the most power available for that decibel rating. Add in the USFS approved spark arrestor and the Competition Series Silencer is almost like getting multiple exhausts in one.

    • Tunable aftermarket exhaust for your ATV
    • Trimax Core features triangular design for increased horsepower and torque extraction at different rpm ranges
    • Trimax Core and removable inserts combine for 3 different power and sound stages
      -Stage 1: Uses an insert that restricts sound levels extensively while producing industry leading power at the approved dB level
      -Stage 2: Uses a different sound-altering insert that partially lowers sound levels without losing the power increase gained in Stage 3
      -Stage 3: Acts as an unrestricted core, producing high dB levels with massive power throughout the entire RPM range.
    • Includes 2 removable/interchangeable inserts, each of which affects sound and power in different ways
    • Features a black powder coated exhaust canister, stainless end cap, rivet bands, and the HMF team sticker
    • Body is made from durable 6063 T6 aluminum alloy
    • Includes USFS approved spark arrester
    • 2 Year limited manufacturer’s warranty

    HMF Racing Competition Series Silencer Reviews

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    0 of 0 people found this review helpful.

    Highly recommended

    Comments On Dec 04, 2015:Install was simple. Like the adjustable sound tip and spark arrestor options. Ended up going with the medium tip since the open tip is overly loud and obnoxious. Make sure to re-jet. Ended up with a 172 main and 45 pilot when running in conjunction with the modquad air filter conversion

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    0 of 0 people found this review helpful.

    Great exhaust

    Comments On May 20, 2015:Power you can feel for a slip on. Being able to change inserts is a plus.

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    0 of 1 people found this review helpful.

    2006 Raptor 700r

    Comments On Apr 15, 2015:Ok i don't have the exhaust but want to know if i can just slip them on or will i need new pipes all the way through?

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    0 of 0 people found this review helpful.

    Don't forget the jets...

    Comments On Mar 11, 2015:All in all a great product. Plan on jetting your carb and tuning it. I advise getting your jets if you purchase it or you'll have to wait to ride and order them. I purchased the slip on And used it on my stock pipe, it has some leaks at the connections and is a very common problem i also suggest you research this on the web before you commit, there are a few fixes if you cannot afford the full system . Too sum it up it sounds great ,gives you more pull and definitely will piss off you neighbors on stage 3....and Mounted easily , The reason I only gave it four stars in the leaks and the clamps that come with the kit don't do there job.

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    0 of 2 people found this review helpful.

    Stock header only?

    Comments On Feb 06, 2015:I bought a quad with a full HMF exhaust, header, mid pipe and silencer. The silencer is shot. Would this fit on the mid pipe or does it have to be the stock system?

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    1 of 1 people found this review helpful.


    Comments On Apr 11, 2014:it only fits the stock head pipe. more info would have been nice. It didn't say that it was a slip-on.

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    1 of 1 people found this review helpful.

    Awesome exhaust

    Comments On Dec 18, 2013:Increased everything I need on my 400ex. The looks, the power and the sound. I love that I can regulate the noise output. Spark filter is easy to take out and clean.

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    1 of 3 people found this review helpful.

    slip on or full ???

    Comments On Oct 20, 2012:is this just a slip on exhaust or full.??
    TECH NOTE: This is just a slip-om muffler.

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    1 of 1 people found this review helpful.


    Comments On Jun 04, 2012:Have it on my 06 raptor 700 stage 3 is loud runs great with the power commander..

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    2 of 3 people found this review helpful.

    Nice and loud

    Comments On Sep 27, 2011:This exhaust sounds wicked and now my 700xx pulls all the way through the powerband

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